diff --git a/library/axi_ad9361/axi_ad9361_constr.xdc b/library/axi_ad9361/axi_ad9361_constr.xdc
index 5b643432a..5173be8bf 100644
--- a/library/axi_ad9361/axi_ad9361_constr.xdc
+++ b/library/axi_ad9361/axi_ad9361_constr.xdc
@@ -6,4 +6,5 @@ set_property ASYNC_REG TRUE \
 
 set_false_path -from [get_cells -hier -filter {name =~ *up_enable_int_reg   && IS_SEQUENTIAL}] -to [get_cells -hier -filter {name =~ *enable_up_m1_reg  && IS_SEQUENTIAL}]
 set_false_path -from [get_cells -hier -filter {name =~ *up_txnrx_int_reg    && IS_SEQUENTIAL}] -to [get_cells -hier -filter {name =~ *txnrx_up_m1_reg   && IS_SEQUENTIAL}]
+set_false_path -to [get_cells -hier -filter {name =~ *tdd_sync_d1_reg   && IS_SEQUENTIAL}]